FLINT, MI -- Two people were convicted of first-degree murder and a third convicted of second-degree murder in the carjacking and shooting death of a 55-year-old Grand Blanc woman, according to a press release.

Nancy E. Johnson, 34, and Matthew A. Risealy, 20, were convicted of first-degree murder while James L. Horn, 21, was convicted of two counts of second-degree murder. They were also convicted of carjacking, carrying a concealed weapon and felony firearm.

Leslie Mills was at the Corunna Road Mobil gas station on March 4, 2012, when they approached her and asked to use the cell phone, investigators said. Riselay was outside the open passenger door when he fired a single shot, police said Johnson then picked up the gun and shot her several more times, police said.

Mills was shoved out of the car and it fled the scene. Police were able to locate the vehicle at the Economy Motel on Corunna Road and the suspects were arrested a short time later.

A fourth person, Phillip M. Eason, pleaded guilty in March to the charge of accessory after the
fact related to his role of hiding the gun that was used in the murder after
the shooting. He was required to testify as part of his plea agreement.

Riselay and Johnson will receive a mandatory life sentence, while Horn faces up to life in prison.

The trio were convicted by three separate juries.

"This
type of crime, involving the most serious offense possible against an
unsuspecting, innocent victim going about her normal routine, is what is most
frightening and most threatening to our community," said Genesee County Prosecutor David Leyton in a statement. "Thanks
to the swift response of local law enforcement at the time of the crime and the
hard work by my staff in partnership with the police over the past year, we
were able to see this case through and a just verdict rendered."

Mike Thomas, the former Saginaw County prosecutor now working under Leyton as part of the state funded program to fight violent crime, tried the case in front of 7th Circuit Court Judge Judith Fullerton.